diff --git a/public/data/vice-a/chunk_0_0.json b/public/data/vice-a/chunk_0_0.json
new file mode 100644
index 0000000..a529352
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+++ b/public/data/vice-a/chunk_0_0.json
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new file mode 100644
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diff --git a/public/data/vice-a/chunk_11_1.json b/public/data/vice-a/chunk_11_1.json
new file mode 100644
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diff --git a/public/data/vice-a/chunk_11_10.json b/public/data/vice-a/chunk_11_10.json
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diff --git a/public/data/vice-a/chunk_11_8.json b/public/data/vice-a/chunk_11_8.json
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diff --git a/public/data/vice-a/chunk_1_1.json b/public/data/vice-a/chunk_1_1.json
new file mode 100644
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diff --git a/public/data/vice-a/chunk_1_4.json b/public/data/vice-a/chunk_1_4.json
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diff --git a/public/data/vice-a/chunk_2_1.json b/public/data/vice-a/chunk_2_1.json
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diff --git a/public/data/vice-a/chunk_2_11.json b/public/data/vice-a/chunk_2_11.json
new file mode 100644
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diff --git a/public/data/vice-a/chunk_3_11.json b/public/data/vice-a/chunk_3_11.json
new file mode 100644
index 0000000..9d50248
--- /dev/null
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diff --git a/public/data/vice-a/chunk_3_2.json b/public/data/vice-a/chunk_3_2.json
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diff --git a/public/data/vice-a/chunk_3_4.json b/public/data/vice-a/chunk_3_4.json
new file mode 100644
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diff --git a/public/data/vice-a/chunk_3_5.json b/public/data/vice-a/chunk_3_5.json
new file mode 100644
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diff --git a/public/data/vice-a/chunk_3_6.json b/public/data/vice-a/chunk_3_6.json
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diff --git a/public/data/vice-a/chunk_3_8.json b/public/data/vice-a/chunk_3_8.json
new file mode 100644
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diff --git a/public/data/vice-a/chunk_4_10.json b/public/data/vice-a/chunk_4_10.json
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diff --git a/public/data/vice-a/chunk_4_11.json b/public/data/vice-a/chunk_4_11.json
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diff --git a/public/data/vice-a/chunk_4_3.json b/public/data/vice-a/chunk_4_3.json
new file mode 100644
index 0000000..050f56b
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diff --git a/public/data/vice-a/chunk_4_4.json b/public/data/vice-a/chunk_4_4.json
new file mode 100644
index 0000000..2b5a3ca
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diff --git a/public/data/vice-a/chunk_4_5.json b/public/data/vice-a/chunk_4_5.json
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diff --git a/public/data/vice-a/chunk_4_9.json b/public/data/vice-a/chunk_4_9.json
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diff --git a/public/data/vice-a/chunk_5_0.json b/public/data/vice-a/chunk_5_0.json
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diff --git a/public/data/vice-a/chunk_5_1.json b/public/data/vice-a/chunk_5_1.json
new file mode 100644
index 0000000..666fbf9
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diff --git a/public/data/vice-a/chunk_5_10.json b/public/data/vice-a/chunk_5_10.json
new file mode 100644
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diff --git a/public/data/vice-a/chunk_5_11.json b/public/data/vice-a/chunk_5_11.json
new file mode 100644
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diff --git a/public/data/vice-a/chunk_5_3.json b/public/data/vice-a/chunk_5_3.json
new file mode 100644
index 0000000..bf936e8
--- /dev/null
+++ b/public/data/vice-a/chunk_5_3.json
@@ -0,0 +1 @@
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diff --git a/public/data/vice-a/chunk_5_4.json b/public/data/vice-a/chunk_5_4.json
new file mode 100644
index 0000000..823ebe1
--- /dev/null
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diff --git a/public/data/vice-a/chunk_5_5.json b/public/data/vice-a/chunk_5_5.json
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diff --git a/public/data/vice-a/chunk_5_9.json b/public/data/vice-a/chunk_5_9.json
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diff --git a/public/data/vice-a/chunk_6_1.json b/public/data/vice-a/chunk_6_1.json
new file mode 100644
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diff --git a/public/data/vice-a/chunk_6_3.json b/public/data/vice-a/chunk_6_3.json
new file mode 100644
index 0000000..316a91c
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diff --git a/public/data/vice-a/chunk_6_4.json b/public/data/vice-a/chunk_6_4.json
new file mode 100644
index 0000000..5050cbf
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diff --git a/public/data/vice-a/chunk_6_7.json b/public/data/vice-a/chunk_6_7.json
new file mode 100644
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diff --git a/public/data/vice-a/chunk_6_8.json b/public/data/vice-a/chunk_6_8.json
new file mode 100644
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diff --git a/public/data/vice-a/chunk_7_1.json b/public/data/vice-a/chunk_7_1.json
new file mode 100644
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diff --git a/public/data/vice-a/chunk_7_7.json b/public/data/vice-a/chunk_7_7.json
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diff --git a/public/data/vice-a/chunk_7_9.json b/public/data/vice-a/chunk_7_9.json
new file mode 100644
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diff --git a/public/data/vice-a/chunk_8_0.json b/public/data/vice-a/chunk_8_0.json
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diff --git a/public/data/vice-a/chunk_8_4.json b/public/data/vice-a/chunk_8_4.json
new file mode 100644
index 0000000..798a6b3
--- /dev/null
+++ b/public/data/vice-a/chunk_8_4.json
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diff --git a/public/data/vice-a/chunk_8_5.json b/public/data/vice-a/chunk_8_5.json
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diff --git a/public/data/vice-a/chunk_8_8.json b/public/data/vice-a/chunk_8_8.json
new file mode 100644
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diff --git a/public/data/vice-a/chunk_8_9.json b/public/data/vice-a/chunk_8_9.json
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diff --git a/public/data/vice-a/chunk_9_1.json b/public/data/vice-a/chunk_9_1.json
new file mode 100644
index 0000000..6d467ae
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diff --git a/public/data/vice-a/chunk_9_2.json b/public/data/vice-a/chunk_9_2.json
new file mode 100644
index 0000000..a410b03
--- /dev/null
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diff --git a/public/data/vice-a/chunk_9_9.json b/public/data/vice-a/chunk_9_9.json
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diff --git a/tools/extract/leonida/emit.py b/tools/extract/leonida/emit.py
new file mode 100644
index 0000000..c5f8dba
--- /dev/null
+++ b/tools/extract/leonida/emit.py
@@ -0,0 +1,98 @@
+import json
+from pathlib import Path
+
+from shapely.geometry import Polygon, box
+
+from .coords import CHUNK_SIZE, SLICE
+
+N = (SLICE["x1"] - SLICE["x0"]) // CHUNK_SIZE   # 12
+
+
+def chunk_box(i: int, j: int) -> Polygon:
+    x0 = SLICE["x0"] + i * CHUNK_SIZE
+    y1 = SLICE["y1"] - j * CHUNK_SIZE
+    return box(x0, y1 - CHUNK_SIZE, x0 + CHUNK_SIZE, y1)
+
+
+def split_by_chunk(poly: Polygon) -> dict[tuple[int, int], Polygon]:
+    out = {}
+    for j in range(N):
+        for i in range(N):
+            part = poly.intersection(chunk_box(i, j))
+            if not part.is_empty and part.area > 0.5:
+                out[(i, j)] = part
+    return out
+
+
+def _ring(poly: Polygon, i: int, j: int) -> list[list[float]]:
+    ox = SLICE["x0"] + i * CHUNK_SIZE
+    oy = SLICE["y1"] - j * CHUNK_SIZE
+    # Welt (X, Y) -> three (x, z) -> relativ zur Chunk-Ecke
+    return [[round(x - ox, 2), round(-y - (-oy), 2)] for x, y in poly.exterior.coords]
+
+
+def chunk_payload(i, j, *, land, surfaces, roads, centerlines, buildings, palms) -> dict:
+    ox = SLICE["x0"] + i * CHUNK_SIZE
+    oy = SLICE["y1"] - j * CHUNK_SIZE
+    return {
+        "chunk": [i, j],
+        "origin": [ox, -oy],
+        "land": [_ring(p, i, j) for p in land],
+        "surfaces": [{"poly": _ring(p, i, j), "kind": k} for p, k in surfaces],
+        "roads": [{"poly": _ring(p, i, j), "bridge": b} for p, b in roads],
+        "centerlines": [[[round(x - ox, 2), round(-y + oy, 2)] for x, y in ln.coords] for ln in centerlines],
+        "buildings": [{"poly": _ring(p, i, j), "height": h["height"],
+                       "source": h["source"], "speculative": s} for p, h, s in buildings],
+        "palms": [[round(x - ox, 2), round(-y + oy, 2)] for x, y in palms],
+    }
+
+
+def chunk_box_of(i: int, j: int) -> Polygon:
+    return chunk_box(i, j)
+
+
+def split_by_chunk_all(polys, i: int, j: int):
+    """Alle Anteile der übergebenen Polygone, die in Chunk (i, j) liegen."""
+    cell = chunk_box(i, j)
+    for poly in polys:
+        part = poly.intersection(cell)
+        if not part.is_empty and part.area > 0.5:
+            if part.geom_type == "Polygon":
+                yield part
+            else:
+                yield from (g for g in part.geoms if g.geom_type == "Polygon" and g.area > 0.5)
+
+
+def in_chunk(point, i: int, j: int) -> bool:
+    x0 = SLICE["x0"] + i * CHUNK_SIZE
+    y1 = SLICE["y1"] - j * CHUNK_SIZE
+    return x0 <= point[0] < x0 + CHUNK_SIZE and y1 - CHUNK_SIZE <= point[1] < y1
+
+
+def write_debug_png(out_dir: Path, mosaic, payloads: list[dict]) -> None:
+    """Ein Bild je Chunk: die extrahierten Vektoren über der Karte, zur Sichtprüfung."""
+    from PIL import Image, ImageDraw
+    out_dir.mkdir(parents=True, exist_ok=True)
+    for payload in payloads:
+        i, j = payload["chunk"]
+        x0, y0 = i * CHUNK_SIZE, j * CHUNK_SIZE
+        crop = Image.fromarray(mosaic[y0:y0 + CHUNK_SIZE, x0:x0 + CHUNK_SIZE]).convert("RGB")
+        draw = ImageDraw.Draw(crop)
+        for ring in payload["land"]:
+            draw.line([tuple(pt) for pt in ring] + [tuple(ring[0])], fill=(0, 255, 255), width=1)
+        for road in payload["roads"]:
+            draw.line([tuple(pt) for pt in road["poly"]], fill=(255, 0, 255), width=1)
+        for b in payload["buildings"]:
+            if len(b["poly"]) >= 3:
+                draw.polygon([tuple(pt) for pt in b["poly"]], outline=(255, 220, 0))
+        for x, z in payload["palms"]:
+            draw.ellipse([x - 2, z - 2, x + 2, z + 2], outline=(0, 200, 0))
+        crop.save(out_dir / f"chunk_{i}_{j}.png")
+
+
+def write_chunks(out_dir: Path, payloads: list[dict], meta: dict) -> None:
+    out_dir.mkdir(parents=True, exist_ok=True)
+    for payload in payloads:
+        i, j = payload["chunk"]
+        (out_dir / f"chunk_{i}_{j}.json").write_text(json.dumps(payload, separators=(",", ":")))
+    (out_dir / "manifest.json").write_text(json.dumps(meta, indent=1))
diff --git a/tools/extract/run.py b/tools/extract/run.py
new file mode 100644
index 0000000..ec0f9bb
--- /dev/null
+++ b/tools/extract/run.py
@@ -0,0 +1,90 @@
+"""Erzeugt aus den Kacheln die Chunk-Dateien. Aufruf: uv run python run.py"""
+import json
+from pathlib import Path
+
+from leonida.buildings import building_polygons
+from leonida.classify import CLASSES, class_shares, classify
+from leonida.emit import (chunk_box_of, chunk_payload, in_chunk, split_by_chunk_all,
+                          write_chunks, write_debug_png)
+from leonida.heights import assign_heights, palm_points
+from leonida.tiles import COMMIT, download_tiles, load_mosaic
+from leonida.vectors import centerlines, land_polygons, mask_polygons, road_polygons
+
+SEED = 20260912
+OUT = Path(__file__).resolve().parents[2] / "public" / "data" / "vice-a"
+TOLERANCE = {"wasser": (0.30, 0.36), "strasse": (0.10, 0.14), "gebaeude": (0.09, 0.13)}
+
+
+def main() -> None:
+    cache = Path("cache")
+    download_tiles(cache)
+    mosaic = load_mosaic(cache)
+    labels, unknown_share = classify(mosaic, report_unknown=True)
+    if unknown_share > 0.05:
+        raise SystemExit(f"{unknown_share:.1%} der Pixel unbekannt. Palette kalibrieren, nicht die Grenze anheben.")
+    shares = class_shares(labels)
+    for name, (lo, hi) in TOLERANCE.items():
+        if not lo <= shares[name] <= hi:
+            raise SystemExit(f"Klassenanteil {name}={shares[name]:.3f} außerhalb {lo}..{hi}. Palette prüfen.")
+
+    land = land_polygons(labels)
+    roads = road_polygons(labels)
+    lines = centerlines(labels)
+    sand = mask_polygons(labels == CLASSES["sand"], 50, 1.0)
+    parks = mask_polygons(labels == CLASSES["gruen"], 50, 1.0)
+    urban = mask_polygons(labels == CLASSES["stadt"], 80, 1.5)
+    surfaces = [(p, "sand") for p in sand] + [(p, "park") for p in parks] + [(p, "urban") for p in urban]
+
+    road_shapes = [p for p, _ in roads]
+    raw = building_polygons(labels)
+    # Nur "spekulativ" (rot) ist mit road_polygons() ueberhaupt doppelt vergeben: die
+    # ROAD_CLASSES in vectors.py zaehlen "spekulativ" selbst als Strassenklasse, und
+    # road_mask() schliesst zusaetzlich mit disk(3), um Strassennamen zu ueberbruecken.
+    # Wuerde man road_shapes (= road_polygons(labels), inklusive dieser Schliessung und
+    # inklusive "spekulativ") direkt gegen ALLE rohen Gebaeude pruefen, vergleicht ein
+    # isoliertes "spekulativ"-Gebaeude sich praktisch mit sich selbst (dieselben Pixel
+    # bilden dort auch das Strassenpolygon) und faellt so gut wie immer heraus: am realen
+    # Mosaik blieben nur 3 von 267 "spekulativ"-Gebaeuden uebrig statt der erwarteten
+    # Groessenordnung (Task-6-Referenzwerte: 258 von 267), und die Schliessung riss
+    # zusaetzlich 211 gewoehnliche (graue) Gebaeude mit, die die Notiz in Task 5 gar nicht
+    # meinte ("die ROTEN Flaechen ... werden abgezogen"). Deshalb hier ein eigenes,
+    # unzweideutiges Strassenmass nur aus "strasse"/"weg" (ohne "spekulativ", ohne die
+    # Namens-Schliessung) und die Pruefung nur auf spekulative Kandidaten begrenzt; graue
+    # Gebaeude durchlaufen ungeprueft. Ergebnis am realen Mosaik: 2.348 Gebaeude, davon 263
+    # spekulativ (Referenz: 2.352 bzw. 258) — Wahrzeichenhoehen (68, 31-248 m) und
+    # Palmenzahl (2.133) treffen die Referenz exakt.
+    unambiguous_mask = (labels == CLASSES["strasse"]) | (labels == CLASSES["weg"])
+    unambiguous_roads = mask_polygons(unambiguous_mask, min_area=20, simplify=0.8)
+    buildings = [(p, s) for p, s in raw
+                 if not s or not any(p.intersection(r).area > 0.5 * p.area for r in unambiguous_roads)]
+
+    landmarks = json.loads(Path("data/skyline.json").read_text())["landmarks"]
+    districts = json.loads(Path("data/districts.json").read_text())
+    heights = assign_heights([p for p, _ in buildings], landmarks, districts, SEED)
+    palms = palm_points(sand, parks, lines, [p for p, _ in buildings], road_shapes,
+                        land, SEED)
+
+    payloads = []
+    for j in range(12):
+        for i in range(12):
+            payloads.append(chunk_payload(
+                i, j,
+                land=list(split_by_chunk_all(land, i, j)),
+                surfaces=[(part, kind) for (p, kind) in surfaces for part in split_by_chunk_all([p], i, j)],
+                roads=[(part, b) for (p, b) in roads for part in split_by_chunk_all([p], i, j)],
+                centerlines=[ln for ln in lines if ln.intersects(chunk_box_of(i, j))],
+                buildings=[(p, h, s) for (p, s), h in zip(buildings, heights)
+                           if p.intersects(chunk_box_of(i, j))],
+                palms=[pt for pt in palms if in_chunk(pt, i, j)],
+            ))
+    write_debug_png(Path("debug"), mosaic, payloads)
+    write_chunks(OUT, payloads, {
+        "slice": "vice-a", "source_commit": COMMIT, "seed": SEED,
+        "chunk_size": 250, "chunks": [p["chunk"] for p in payloads],
+        "class_shares": shares,
+        "attribution": "Kartenkacheln: GTA VI Map (CC BY 4.0) — https://map.gtadb.org, YANIS v15. Wahrzeichen: rolux/gtamaplib-vc (Unlicense).",
+    })
+
+
+if __name__ == "__main__":
+    main()
diff --git a/tools/extract/tests/test_emit.py b/tools/extract/tests/test_emit.py
new file mode 100644
index 0000000..1185405
--- /dev/null
+++ b/tools/extract/tests/test_emit.py
@@ -0,0 +1,25 @@
+import json
+from shapely.geometry import Polygon
+from leonida.emit import chunk_payload, split_by_chunk
+
+BIG = Polygon([(-1000, 2500), (-700, 2500), (-700, 2200), (-1000, 2200)])   # Chunk (0,0) und Nachbarn
+
+def test_polygon_is_clipped_into_its_chunks():
+    parts = split_by_chunk(BIG)
+    assert set(parts) >= {(0, 0), (1, 0), (0, 1), (1, 1)}
+    assert abs(sum(p.area for p in parts.values()) - BIG.area) < 1.0
+
+def test_coordinates_are_chunk_local_three_js():
+    # chunk_payload() nimmt (wie in run.py) bereits chunk-geschnittene Geometrie entgegen;
+    # BIG selbst überspannt vier Chunks (siehe Test oben), darum hier zuerst zuschneiden.
+    clipped = split_by_chunk(BIG)[(0, 0)]
+    payload = chunk_payload(0, 0, land=[clipped], surfaces=[], roads=[], centerlines=[], buildings=[], palms=[])
+    ring = payload["land"][0]
+    assert payload["origin"] == [-1000, -2500]          # three-z = -Y
+    assert min(x for x, _ in ring) >= -0.01
+    assert max(x for x, _ in ring) <= 250.01
+
+def test_payload_matches_schema():
+    payload = chunk_payload(2, 3, land=[], surfaces=[], roads=[], centerlines=[], buildings=[], palms=[])
+    assert set(payload) == {"chunk", "origin", "land", "surfaces", "roads", "centerlines", "buildings", "palms"}
+    assert payload["chunk"] == [2, 3]